Official's Leak Meant to Subvert Gun Probe

WASHINGTON—A former top federal prosecutor in Arizona leaked internal documents to reporters in 2011, aiming to undermine a congressional investigation into the botched Fast and Furious gun-trafficking sting, the Justice Department inspector general said.

In a report issued Monday, the inspector general said that Dennis Burke violated Justice Department policies by leaking memos to reporters from Fox News and the New York Times. The memos were related to stings that were similar to the Fast and Furious case, and Mr. Burke...